When I first saw these never-before-seen time-lapse videos—captured over the course of 14 years by the Hubble Space Telescope—I just couldn't believe my eyes. Hubble photos can be beautiful, but these videos just left me speechless. »9/01/11 12:50pm 9/01/11 12:50pm

In 2006, a NASA spacecraft returned to Earth with samples that scientists hoped might contain cosmic dust, a byproduct of star formation. They let the public look for the elusive particles online. A squinting citizen might have just found one. »3/06/10 4:00pm 3/06/10 4:00pm